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WO1998030989A1 - Dispositif de surveillance - Google Patents

Dispositif de surveillance Download PDF

Info

Publication number
WO1998030989A1
WO1998030989A1 PCT/GB1997/000033 GB9700033W WO9830989A1 WO 1998030989 A1 WO1998030989 A1 WO 1998030989A1 GB 9700033 W GB9700033 W GB 9700033W WO 9830989 A1 WO9830989 A1 WO 9830989A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
camera
housing
opaque
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/GB1997/000033
Other languages
English (en)
Inventor
Mark Gregory Pitts
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Texecom Ltd
Original Assignee
Texecom Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Texecom Ltd filed Critical Texecom Ltd
Priority to GB9915969A priority Critical patent/GB2337656A/en
Priority to AU13877/97A priority patent/AU1387797A/en
Priority to PCT/GB1997/000033 priority patent/WO1998030989A1/fr
Publication of WO1998030989A1 publication Critical patent/WO1998030989A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19626—Surveillance camera constructional details optical details, e.g. lenses, mirrors or multiple lenses
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
    • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
    • G08B13/19617—Surveillance camera constructional details
    • G08B13/19619—Details of casing
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B15/00—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives
    • G08B15/001—Concealed systems, e.g. disguised alarm systems to make covert systems

Definitions

  • This invention relates to a surveillance device and more particularly a device for covert surveillance.
  • a covert surveillance device comprising a housing for a sensor, characterised in that a camera is disposed within the housing and the housing includes a lens, said lens comprising opaque portions for reflecting light and transparent portions defined by said opaque portions, said transparent portions permitting the transmission of light from outside the housing to the camera, and the camera including a lens, said camera lens being dimensionally larger than the opaque portions.
  • the housing has the appearance of a passive infra red (PIR) sensor of the kind which are commonly installed in burglar alarm systems for detecting the presence of an intruder.
  • PIR passive infra red
  • the public are now quite used to seeing PIR units installed in places such as shops, cafes, offices and so on and will not, therefore, suspect that such units may be there for a different purpose, namely surveillance.
  • the lenses of such units appear somewhat opaque when viewed from outside the unit in normal lighting conditions. It is preferred that in the unit of the invention the lens of the housing behind which the camera is disposed should, as far as possible, resemble the lens of a PIR unit.
  • the lens is in the form of an opaque mesh.
  • an opaque mask extends behind the partially opaque lens of the housing, the mask having an aperture or transparent portion therein which corresponds to the location of the lens of the camera inside the housing. Because the level of illumination within the housing is lower than the level of illumination outside it an observer will see light reflected from the opaque lens and not see into the housing and as a result cannot identify the presence of a camera therein.
  • the camera in the device of the invention can be linked to a monitor at some remote location and/or means can also be linked to the camera to record what the camera observes much in the same way as known closed circuit systems.
  • Fig.l is a front exterior elevation of a device of the invention.
  • Fig.2 is a view of the interior of the front face of the device of Fig.l;
  • Fig.3 is a vertical section through the device.
  • the covert surveillance device comprises a housing 10 having the appearance of a PIR sensor.
  • An aperture 12 is provided in the front face of the housing into which a lens 14 is fitted.
  • the lens comprises a fine opaque mesh 16 formed, for example, by perforating a metal sheet.
  • the outer side of the mesh is preferably white or light coloured so as to reflect incident light.
  • an opaque sheet 18 extends over the lens 14.
  • An aperture 20 is provided in the opaque sheet 18. The purpose of the aperture is to enable a camera 22 within the housing to take pictures. To that end the aperture needs to be only the same size as the camera lens 24.
  • the provision of the opaque sheet helps to ensure that an observer cannot see into the housing and identify the camera therein.
  • the area where light passes into the housing is through the aperture in the opaque sheet and with the camera lens close up to the part of the mesh adjacent the aperture, vision into the housing through the aperture is virtually impossible.
  • the opaque sheet may have one or more additional apertures to provide through vision to an LED or to permit sound to reach a microphone. These items would be disposed in a tube or the like so that again an observer could not see the camera in the housing.
  • the dimensions of the opaque lines forming the mesh and their relative spacing should be such that they are relatively small compared to the dimensions of the camera lens so that they do not seriously impair the image that is received by the camera lens. Further because the camera lens will be focussed to a distance well beyond the mesh, the image received by the camera will not include the mesh. In this connection the camera response is similar to the human eye which will not see a fine mesh placed closely in front of it when focussed on a point some distance away.
  • the lens for the housing can be made of a transparent sheet of plastics or glass having an opaque mesh formed thereon as by printing, etching or other method.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Studio Devices (AREA)

Abstract

Dispositif de surveillance secrète comprenant un boîtier (10) d'unité d'infrarouges passifs (PIR), un hublot (14) situé dans le boîtier et constitué par un treillis (16), ainsi que par une feuille opaque (18) placé derrière le hublot. Une caméra (22) est située dans le boîtier et son objectif (24) est aligné sur une ouverture (20) pratiquée dans la feuille opaque (18).
PCT/GB1997/000033 1997-01-08 1997-01-08 Dispositif de surveillance Ceased WO1998030989A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9915969A GB2337656A (en) 1997-01-08 1997-01-08 Surveillance device
AU13877/97A AU1387797A (en) 1997-01-08 1997-01-08 Surveillance device
PCT/GB1997/000033 WO1998030989A1 (fr) 1997-01-08 1997-01-08 Dispositif de surveillance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1997/000033 WO1998030989A1 (fr) 1997-01-08 1997-01-08 Dispositif de surveillance

Publications (1)

Publication Number Publication Date
WO1998030989A1 true WO1998030989A1 (fr) 1998-07-16

Family

ID=10805495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/000033 Ceased WO1998030989A1 (fr) 1997-01-08 1997-01-08 Dispositif de surveillance

Country Status (3)

Country Link
AU (1) AU1387797A (fr)
GB (1) GB2337656A (fr)
WO (1) WO1998030989A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0986038A3 (fr) * 1998-09-09 2001-05-16 Bridisco Limited Boítier contenant un détecteur PIR et une caméra
EP1381005A1 (fr) * 2002-07-08 2004-01-14 Siemens Building Technologies AG Détecteur d'événement avec une caméra

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH512794A (fr) * 1970-03-09 1971-09-15 Behles Guy Dispositif pour dissimuler une caméra
US4160999A (en) * 1978-04-05 1979-07-10 Claggett Joseph H Mounting arrangement for a television monitoring camera
WO1993005614A1 (fr) * 1991-09-02 1993-03-18 Takenaka Engineering Co., Ltd. Enceinte pour camera de surveillance
EP0562948A1 (fr) * 1992-03-23 1993-09-29 Sony Corporation Assemblage de boîtier pour loger une vidéo camera de surveillance
EP0668692A1 (fr) * 1994-02-18 1995-08-23 Siemens Aktiengesellschaft Caméra vidéo protégée contre les radiations électromagnétiques
DE29605518U1 (de) * 1996-03-26 1996-05-23 Aarcon Prauss Arminius Gmbh Videoüberwachungsvorrichtung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH512794A (fr) * 1970-03-09 1971-09-15 Behles Guy Dispositif pour dissimuler une caméra
US3739703A (en) * 1970-03-09 1973-06-19 G Behles Concealment of cameras for observational purposes
US4160999A (en) * 1978-04-05 1979-07-10 Claggett Joseph H Mounting arrangement for a television monitoring camera
WO1993005614A1 (fr) * 1991-09-02 1993-03-18 Takenaka Engineering Co., Ltd. Enceinte pour camera de surveillance
EP0562948A1 (fr) * 1992-03-23 1993-09-29 Sony Corporation Assemblage de boîtier pour loger une vidéo camera de surveillance
EP0668692A1 (fr) * 1994-02-18 1995-08-23 Siemens Aktiengesellschaft Caméra vidéo protégée contre les radiations électromagnétiques
DE29605518U1 (de) * 1996-03-26 1996-05-23 Aarcon Prauss Arminius Gmbh Videoüberwachungsvorrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0986038A3 (fr) * 1998-09-09 2001-05-16 Bridisco Limited Boítier contenant un détecteur PIR et une caméra
EP1381005A1 (fr) * 2002-07-08 2004-01-14 Siemens Building Technologies AG Détecteur d'événement avec une caméra

Also Published As

Publication number Publication date
GB2337656A (en) 1999-11-24
AU1387797A (en) 1998-08-03
GB9915969D0 (en) 1999-09-08

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